feat(budget): add "Fuel" and "Parking" expense categories

- Adds two new fixed budget categories: fuel ("Fuel") and parkings
  ("Parking"), alongside the existing set (Accommodation, Food & drink,
  Groceries, Transport, Flights, Activities, Sightseeing, Shopping,
  Fees & tickets, Health, Tips, Other).
- Icon/color metadata added for both (Fuel and ParkingCircle from
  lucide-react), plus legacy free-text aliases (gas/petrol->fuel,
  parking->parkings) for existing/imported expense rows.
- Label strings added for all 23 supported locales.
- Adds test coverage for the new categories and legacy alias mapping.

client/src/components/Budget/costsCategories.test.ts

@@ -0,0 +1,34 @@
+import { describe, it, expect } from 'vitest'
+import { COST_CATEGORIES } from '@trek/shared'
+import { COST_CAT_META, COST_CATEGORY_LIST, catMeta } from './costsCategories'
+
+describe('COST_CAT_META', () => {
+  it('has metadata for every fixed category, including fuel and parkings', () => {
+    for (const key of COST_CATEGORIES) {
+      expect(COST_CAT_META[key]).toBeDefined()
+      expect(COST_CAT_META[key].key).toBe(key)
+    }
+  })
+
+  it('derives COST_CATEGORY_LIST in the same order as COST_CATEGORIES', () => {
+    expect(COST_CATEGORY_LIST.map(m => m.key)).toEqual([...COST_CATEGORIES])
+  })
+})
+
+describe('catMeta', () => {
+  it('resolves fuel and parkings directly', () => {
+    expect(catMeta('fuel').key).toBe('fuel')
+    expect(catMeta('parkings').key).toBe('parkings')
+  })
+
+  it('maps legacy/free-text aliases to the new categories', () => {
+    expect(catMeta('gas').key).toBe('fuel')
+    expect(catMeta('petrol').key).toBe('fuel')
+    expect(catMeta('parking').key).toBe('parkings')
+  })
+
+  it('falls back to other for unknown categories', () => {
+    expect(catMeta('made-up-category').key).toBe('other')
+    expect(catMeta(null).key).toBe('other')
+  })
+})

client/src/components/Budget/costsCategories.tsx

@@ -1,4 +1,4 @@
-import { Hotel, Utensils, ShoppingCart, Bus, Plane, Ticket, Camera, ShoppingBag, FileText, HeartPulse, Coins, MoreHorizontal } from 'lucide-react'
+import { Hotel, Utensils, ShoppingCart, Bus, Plane, Ticket, Camera, ShoppingBag, FileText, HeartPulse, Coins, MoreHorizontal, Fuel, ParkingCircle } from 'lucide-react'
 import type { LucideIcon } from 'lucide-react'
 import { COST_CATEGORIES, type CostCategory } from '@trek/shared'
 
@@ -27,6 +27,8 @@ export const COST_CAT_META: Record<CostCategory, CostCategoryMeta> = {
   fees:          { key: 'fees',          labelKey: 'costs.cat.fees',          Icon: FileText, color: '#475569' },
   health:        { key: 'health',        labelKey: 'costs.cat.health',        Icon: HeartPulse, color: '#dc2626' },
   tips:          { key: 'tips',          labelKey: 'costs.cat.tips',          Icon: Coins, color: '#d97706' },
+  fuel:          { key: 'fuel',          labelKey: 'costs.cat.fuel',          Icon: Fuel, color: '#f59e0b' },
+  parkings:      { key: 'parkings',      labelKey: 'costs.cat.parkings',      Icon: ParkingCircle, color: '#3b82f6' },
   other:         { key: 'other',         labelKey: 'costs.cat.other',         Icon: MoreHorizontal, color: '#6b7280' },
 }
 
@@ -51,6 +53,8 @@ const LEGACY_CATEGORY_MAP: Record<string, CostCategory> = {
   fee: 'fees', fees: 'fees',
   health: 'health', medical: 'health',
   tip: 'tips', tips: 'tips',
+  gas: 'fuel', fuel: 'fuel', petrol: 'fuel',
+  parking: 'parkings', parkings: 'parkings',
   other: 'other', misc: 'other',
 }
 

shared/src/budget/budget.schema.spec.ts

@@ -3,6 +3,7 @@ import {
   budgetUpdateMembersRequestSchema,
   budgetToggleMemberPaidRequestSchema,
   budgetReorderItemsRequestSchema,
+  COST_CATEGORIES,
 } from './budget.schema';
 
 import { describe, it, expect } from 'vitest';
@@ -41,3 +42,10 @@ describe('budgetReorderItemsRequestSchema', () => {
     expect(budgetReorderItemsRequestSchema.safeParse({ orderedIds: ['a'] }).success).toBe(false);
   });
 });
+
+describe('COST_CATEGORIES', () => {
+  it('includes fuel and parkings alongside the existing fixed categories', () => {
+    expect(COST_CATEGORIES).toContain('fuel');
+    expect(COST_CATEGORIES).toContain('parkings');
+  });
+});

shared/src/budget/budget.schema.ts

@@ -46,6 +46,8 @@ export const COST_CATEGORIES = [
   'fees',
   'health',
   'tips',
+  'fuel',
+  'parkings',
   'other',
 ] as const;
 export type CostCategory = (typeof COST_CATEGORIES)[number];

shared/src/i18n/ar/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'الرسوم والتذاكر',
   'costs.cat.health': 'الصحة',
   'costs.cat.tips': 'البقشيش',
+  'costs.cat.fuel': 'وقود',
+  'costs.cat.parkings': 'موقف سيارات',
   'costs.cat.other': 'أخرى',
   'costs.daysCount': '{count} أيام',
   'costs.travelers': '{count} مسافرين',

shared/src/i18n/br/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Taxas e ingressos',
   'costs.cat.health': 'Saúde',
   'costs.cat.tips': 'Gorjetas',
+  'costs.cat.fuel': 'Combustível',
+  'costs.cat.parkings': 'Estacionamento',
   'costs.cat.other': 'Outros',
   'costs.daysCount': '{count} dias',
   'costs.travelers': '{count} viajantes',

shared/src/i18n/ca/budget.ts

@@ -116,6 +116,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Taxes i entrades',
   'costs.cat.health': 'Salut',
   'costs.cat.tips': 'Propines',
+  'costs.cat.fuel': 'Combustible',
+  'costs.cat.parkings': 'Aparcament',
   'costs.cat.other': 'Altres',
   'costs.daysCount': '{count} dies',
   'costs.travelers': '{count} viatgers',

shared/src/i18n/cs/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Poplatky a vstupenky',
   'costs.cat.health': 'Zdraví',
   'costs.cat.tips': 'Spropitné',
+  'costs.cat.fuel': 'Palivo',
+  'costs.cat.parkings': 'Parkování',
   'costs.cat.other': 'Ostatní',
   'costs.daysCount': '{count} dní',
   'costs.travelers': '{count} cestovatelů',

shared/src/i18n/de/budget.ts

@@ -120,6 +120,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Gebühren & Tickets',
   'costs.cat.health': 'Gesundheit',
   'costs.cat.tips': 'Trinkgeld',
+  'costs.cat.fuel': 'Kraftstoff',
+  'costs.cat.parkings': 'Parken',
   'costs.cat.other': 'Sonstiges',
   'costs.daysCount': '{count} Tage',
   'costs.travelers': '{count} Reisende',

shared/src/i18n/en/budget.ts

@@ -124,6 +124,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Fees & tickets',
   'costs.cat.health': 'Health',
   'costs.cat.tips': 'Tips',
+  'costs.cat.fuel': 'Fuel',
+  'costs.cat.parkings': 'Parking',
   'costs.cat.other': 'Other',
   'costs.daysCount': '{count} days',
   'costs.travelers': '{count} travelers',

shared/src/i18n/es/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Tasas y entradas',
   'costs.cat.health': 'Salud',
   'costs.cat.tips': 'Propinas',
+  'costs.cat.fuel': 'Combustible',
+  'costs.cat.parkings': 'Aparcamiento',
   'costs.cat.other': 'Otros',
   'costs.daysCount': '{count} días',
   'costs.travelers': '{count} viajeros',

shared/src/i18n/fr/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Frais et billets',
   'costs.cat.health': 'Santé',
   'costs.cat.tips': 'Pourboires',
+  'costs.cat.fuel': 'Carburant',
+  'costs.cat.parkings': 'Parking',
   'costs.cat.other': 'Autre',
   'costs.daysCount': '{count} jours',
   'costs.travelers': '{count} voyageurs',

shared/src/i18n/gr/budget.ts

@@ -118,6 +118,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Τέλη & εισιτήρια',
   'costs.cat.health': 'Υγεία',
   'costs.cat.tips': 'Φιλοδωρήματα',
+  'costs.cat.fuel': 'Καύσιμα',
+  'costs.cat.parkings': 'Στάθμευση',
   'costs.cat.other': 'Άλλα',
   'costs.daysCount': '{count} ημέρες',
   'costs.travelers': '{count} ταξιδιώτες',

shared/src/i18n/hu/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Díjak és jegyek',
   'costs.cat.health': 'Egészség',
   'costs.cat.tips': 'Borravaló',
+  'costs.cat.fuel': 'Üzemanyag',
+  'costs.cat.parkings': 'Parkolás',
   'costs.cat.other': 'Egyéb',
   'costs.daysCount': '{count} nap',
   'costs.travelers': '{count} utazó',

shared/src/i18n/id/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Biaya & tiket',
   'costs.cat.health': 'Kesehatan',
   'costs.cat.tips': 'Tip',
+  'costs.cat.fuel': 'Bahan Bakar',
+  'costs.cat.parkings': 'Parkir',
   'costs.cat.other': 'Lainnya',
   'costs.daysCount': '{count} hari',
   'costs.travelers': '{count} pelancong',

shared/src/i18n/it/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Tariffe e biglietti',
   'costs.cat.health': 'Salute',
   'costs.cat.tips': 'Mance',
+  'costs.cat.fuel': 'Carburante',
+  'costs.cat.parkings': 'Parcheggio',
   'costs.cat.other': 'Altro',
   'costs.daysCount': '{count} giorni',
   'costs.travelers': '{count} viaggiatori',

shared/src/i18n/ja/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': '手数料・チケット',
   'costs.cat.health': '健康',
   'costs.cat.tips': 'チップ',
+  'costs.cat.fuel': '燃料',
+  'costs.cat.parkings': '駐車場',
   'costs.cat.other': 'その他',
   'costs.daysCount': '{count}日間',
   'costs.travelers': '{count}人の旅行者',

shared/src/i18n/ko/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': '요금 및 입장권',
   'costs.cat.health': '건강',
   'costs.cat.tips': '팁',
+  'costs.cat.fuel': '연료',
+  'costs.cat.parkings': '주차',
   'costs.cat.other': '기타',
   'costs.daysCount': '{count}일',
   'costs.travelers': '여행자 {count}명',

shared/src/i18n/nl/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Kosten & tickets',
   'costs.cat.health': 'Gezondheid',
   'costs.cat.tips': 'Fooien',
+  'costs.cat.fuel': 'Brandstof',
+  'costs.cat.parkings': 'Parkeren',
   'costs.cat.other': 'Overig',
   'costs.daysCount': '{count} dagen',
   'costs.travelers': '{count} reizigers',

shared/src/i18n/pl/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Opłaty i bilety',
   'costs.cat.health': 'Zdrowie',
   'costs.cat.tips': 'Napiwki',
+  'costs.cat.fuel': 'Paliwo',
+  'costs.cat.parkings': 'Parking',
   'costs.cat.other': 'Inne',
   'costs.daysCount': 'Dni: {count}',
   'costs.travelers': 'Podróżnych: {count}',

shared/src/i18n/ru/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Сборы и билеты',
   'costs.cat.health': 'Здоровье',
   'costs.cat.tips': 'Чаевые',
+  'costs.cat.fuel': 'Топливо',
+  'costs.cat.parkings': 'Парковка',
   'costs.cat.other': 'Прочее',
   'costs.daysCount': '{count} дней',
   'costs.travelers': '{count} путешественников',

shared/src/i18n/sv/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Avgifter och biljetter',
   'costs.cat.health': 'Hälsa',
   'costs.cat.tips': 'Dricks',
+  'costs.cat.fuel': 'Bränsle',
+  'costs.cat.parkings': 'Parkering',
   'costs.cat.other': 'Annat',
   'costs.daysCount': '{count} dagar',
   'costs.travelers': '{count} resenärer',

shared/src/i18n/tr/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Ücretler & biletler',
   'costs.cat.health': 'Sağlık',
   'costs.cat.tips': 'Bahşişler',
+  'costs.cat.fuel': 'Yakıt',
+  'costs.cat.parkings': 'Otopark',
   'costs.cat.other': 'Diğer',
   'costs.daysCount': '{count} gün',
   'costs.travelers': '{count} yolcu',

shared/src/i18n/uk/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Збори та квитки',
   'costs.cat.health': 'Здоров’я',
   'costs.cat.tips': 'Чайові',
+  'costs.cat.fuel': 'Пальне',
+  'costs.cat.parkings': 'Паркування',
   'costs.cat.other': 'Інше',
   'costs.daysCount': '{count} днів',
   'costs.travelers': '{count} мандрівників',

shared/src/i18n/vi/budget.ts

@@ -117,6 +117,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': 'Phí & vé',
   'costs.cat.health': 'Sức khỏe',
   'costs.cat.tips': 'Mẹo',
+  'costs.cat.fuel': 'Nhiên liệu',
+  'costs.cat.parkings': 'Bãi đỗ xe',
   'costs.cat.other': 'Khác',
   'costs.daysCount': '{count} ngày',
   'costs.travelers': '{count} người',

shared/src/i18n/zh-TW/budget.ts

@@ -116,6 +116,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': '費用與票券',
   'costs.cat.health': '健康',
   'costs.cat.tips': '小費',
+  'costs.cat.fuel': '燃油',
+  'costs.cat.parkings': '停車',
   'costs.cat.other': '其他',
   'costs.daysCount': '{count} 天',
   'costs.travelers': '{count} 位旅伴',

shared/src/i18n/zh/budget.ts

@@ -116,6 +116,8 @@ const budget: TranslationStrings = {
   'costs.cat.fees': '费用与门票',
   'costs.cat.health': '健康',
   'costs.cat.tips': '小费',
+  'costs.cat.fuel': '燃油',
+  'costs.cat.parkings': '停车',
   'costs.cat.other': '其他',
   'costs.daysCount': '{count} 天',
   'costs.travelers': '{count} 位同行者',